Self-sharpening hole punch for plastic bags

Details Self-sharpening hole punch for plastic bags Self-sharpening hole punch for plastic bags

1985-06-26

1987-03-31

Meister, James M.

Cutting

Tool or tool with support

Cutting couple type

83542, 83684, B26F 118, B26F 114

Patent

active

046533729

ABSTRACT:
A self-sharpening hole punch for plastic bags includes a pneumatically operated punching apparatus for punching wicket pin receiving holes in a flexible film or plastic bag. If desired, a tear slit may be simultaneously formed to enable the bag to be quickly and readily torn free from the wicket pin upon which the bag is retained. The disclosed embodiment utilizes a pneumatic air cylinder having a free end of the cylinder rod having a fitting secured thereto having an internal tapered bore. Interchangeable plastic cutting tools, having a complementary tapered thread, may be interchangeably threaded into the fitting to facilitate replacement as necessary.

REFERENCES:
patent: 1451610 (1923-04-01), Gestas
patent: 3469488 (1969-09-01), Gaspari
patent: 3550494 (1970-12-01), Adams
patent: 3973453 (1976-08-01), Tameo
Jackson et al., Acetal Homopolymer, Modern Plastics Encyclopedia pp. 8-9, 1985.

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